ZOOT SPORTS Men's Ultra Flexwind Running Jacket Front 50 g SWIFT ETHERwind-61% nylon/39% CD polyester Sleeves/Side Insets 78 g ETHERwind-100% polyester Back Inset 279 g MEGAHEATthermo-100% polyester Imported ETHERwind provides wind and water protection Reflectivity 50+ UPF Protection